dawidwys opened a new pull request #11527:  [FLINK-16035] Updated 
Stream/BatchTableEnvironment.java to use Java's Expression DSL
URL: https://github.com/apache/flink/pull/11527
 
 
   ## What is the purpose of the change
   
   This PR introduces alternatives for methods that are using the String based 
expressions in TableEnvironments.
   
   This PR also removes all usages of the String based expressions methods. It 
is a preparation for deprecating and in result removing those methods in the 
future.
   ## Brief change log
   
   It also deprecates the methods in TableEnvironments that accept expressions 
as Strings.
   
   ## Verifying this change
   
   This change is already covered by existing tests.
   
   
   ## Does this pull request potentially affect one of the following parts:
   
     - Dependencies (does it add or upgrade a dependency): (yes / **no**)
     - The public API, i.e., is any changed class annotated with 
`@Public(Evolving)`: (**yes** / no)
     - The serializers: (yes / **no** / don't know)
     - The runtime per-record code paths (performance sensitive): (yes / **no** 
/ don't know)
     - Anything that affects deployment or recovery: JobManager (and its 
components), Checkpointing, Kubernetes/Yarn/Mesos, ZooKeeper: (yes / **no** / 
don't know)
     - The S3 file system connector: (yes / **no** / don't know)
   
   ## Documentation
   
     - Does this pull request introduce a new feature? (yes / **no**)
     - If yes, how is the feature documented? (not applicable / docs / 
**JavaDocs** / not documented): documentation will be updated in a separate PR.
   

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